Row unit for a seed-planting implement having a furrow depth adjustment system

ABSTRACT

A row unit for a seed-planting implement includes a frame, a gauge wheel arm pivotably coupled to the frame and a gauge wheel rotatably coupled to the gauge wheel arm. Additionally, the row unit includes a wobble bracket configured to engage the gauge wheel arm and a linkage arm coupled to the wobble bracket. Moreover, the row unit includes an actuator, a gearbox coupled to the actuator, and a threaded shaft coupled to the gearbox. In addition, the row unit includes an actuation assembly such that the actuation assembly transmits rotation of the threaded shaft into linear motion of the linkage arm. The actuation assembly includes a hook arm having a first end forming a hook that directly couples to the linkage arm and a second end pivotably coupled to the frame. Furthermore, the actuation assembly includes a collar threadingly coupled to the threaded shaft.

FIELD OF THE INVENTION

The present disclosure generally relates to seed-planting implements and, more particularly, to a row unit for a seed-planting implement having a furrow depth adjustment system.

BACKGROUND OF THE INVENTION

Modern farming practices strive to increase yields of agricultural fields. In this respect, seed-planting implements are towed behind a tractor or other agricultural vehicle to disperse seed throughout a field. For example, seed-planting implements typically include one or more furrow-forming tools or openers that excavate a furrow or trench in the soil. One or more dispensing devices of the seed-planting implements may, in turn, deposit the seeds into the furrow(s). After deposition of the seeds, a closing assembly may close the furrow in the soil, such as by pushing the excavated soil into the furrow.

The desired depth of the furrow can vary depending on various parameters associated with the field. For example, the desired depth of the furrow varies depending on the soil moisture content of the field. In this respect, furrow depth adjustment systems for seed-planting implements have been developed. While such systems work well, further improvements are needed.

Accordingly, an improved furrow depth adjustment system for a seed-planting implement would be welcomed in the technology.

SUMMARY OF THE INVENTION

Aspects and advantages of the technology will be set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the technology.

In one aspect, the present subject matter is directed to a row unit for a seed-planting implement. The row unit includes a frame and a disk opener rotatably coupled to the frame, with the disk opener configured to form a furrow within a field across which the seed-planting implement is traveling. Furthermore, the row unit includes a gauge wheel arm pivotably coupled to the frame and a gauge wheel rotatably coupled to the gauge wheel arm, with the gauge wheel configured to roll along a surface of the field. Additionally, the row unit includes a wobble bracket configured to engage the gauge wheel arm and a linkage arm coupled to the wobble bracket. Moreover, the row unit includes an actuator configured to move the linkage arm relative to the frame in a manner that adjusts a position of the gauge wheel relative to the frame, a gearbox coupled to the actuator, and a threaded shaft coupled to the gearbox. In addition, the row unit includes an actuation assembly coupled between the linkage arm and the threaded shaft such that the actuation assembly transmits rotation of the threaded shaft into linear motion of the linkage arm. The actuation assembly, in turn, includes a hook arm having a first end and a second end opposed to the first end, with the first end forming a hook that directly couples to the linkage arm and the second end pivotably coupled to the frame. Furthermore, the actuation assembly includes a collar threadingly coupled to the threaded shaft.

In another aspect, the present subject matter is directed to seed-planting implement. The seed-planting implement includes a toolbar and a plurality of row units coupled to the toolbar. Each row unit includes a frame and a disk opener rotatably coupled to the frame, with the disk opener configured to form a furrow within a field across which the seed-planting implement is traveling. Furthermore, each row unit includes a gauge wheel arm pivotably coupled to the frame and a gauge wheel rotatably coupled to the gauge wheel arm, with the gauge wheel configured to roll along a surface of the field. Additionally, each row unit includes a wobble bracket configured to engage the gauge wheel arm and a linkage arm coupled to the wobble bracket. Moreover, each row unit includes an actuator configured to move the linkage arm relative to the frame in a manner that adjusts a position of the gauge wheel relative to the frame, a gearbox coupled to the actuator, and a threaded shaft coupled to the gearbox. In addition, each row unit includes an actuation assembly coupled between the linkage arm and the threaded shaft such that the actuation assembly transmits rotation of the threaded shaft into linear motion of the linkage arm. The actuation assembly, in turn, includes a hook arm having a first end and a second end opposed to the first end, with the first end forming a hook that directly couples to the linkage arm and the second end pivotably coupled to the frame. Furthermore, the actuation assembly includes a collar threadingly coupled to the threaded shaft.

These and other features, aspects and advantages of the present technology will become better understood with reference to the following description and appended claims. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the technology and, together with the description, serve to explain the principles of the technology.

BRIEF DESCRIPTION OF THE DRAWINGS

A full and enabling disclosure of the present technology, including the best mode thereof, directed to one of ordinary skill in the art, is set forth in the specification, which makes reference to the appended figures, in which:

FIG. 1 illustrates a perspective view of one embodiment of a seed-planting in accordance with aspects of the present subject matter;

FIG. 2 illustrates a perspective view of one embodiment of a row unit for a seed-planting in accordance with aspects of the present subject matter;

FIG. 3 illustrates a partial, front view of one embodiment of a row unit for a seed-planting implement in accordance with aspects of the present subject matter, particularly illustrating a pair of gauge wheel arms of the row unit;

FIG. 4 illustrates a partial cross-sectional view of one embodiment of a row unit for a seed-planting implement in accordance with aspects of the present subject matter, particularly illustrating one embodiment of a furrow depth adjustment system of the row unit;

FIG. 5 illustrates an enlarged, partial cross-sectional view of one embodiment of a row unit for a seed-planting implement in accordance with aspects of the present subject matter, further illustrating the embodiment of the furrow depth adjustment system shown in FIG. 4 ;

FIG. 6 illustrates a partial top view of the embodiment of a furrow depth adjustment system shown in FIGS. 4 and 5 , particularly illustrating a hook arm directly coupled to a linkage arm;

FIG. 7 illustrates a partial cross-sectional view of the furrow depth adjustment system shown in FIGS. 4-6 , particularly illustrating a collar threadingly engaged with a threaded shaft;

FIG. 8 illustrates a partial cross-sectional view of the furrow depth adjustment system shown in FIGS. 4-7 , particularly illustrating an threaded shaft extending through a depth-setting register defined by a frame of the row unit;

FIG. 9 illustrates an enlarged, partial cross-sectional view of one embodiment of a row unit for a seed-planting implement in accordance with aspects of the present subject matter, further illustrating another embodiment of the furrow depth adjustment system; and

FIG. 10 illustrates an enlarged, partial cross-sectional view of one embodiment of a row unit for a seed-planting implement in accordance with aspects of the present subject matter, further illustrating yet another embodiment of the furrow depth adjustment system.

Repeat use of reference characters in the present specification and drawings is intended to represent the same or analogous features or elements of the present technology.

DETAILED DESCRIPTION OF THE DRAWINGS

Reference now will be made in detail to embodiments of the invention, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.

In general, the present subject matter is directed to a row unit for a seed-planting implement having a furrow depth adjustment system. More specifically, the row unit includes a frame and one or more disk openers rotatably coupled to the frame. Furthermore, the row unit includes one or more gauge wheels pivotably coupled to the frame via an associated gauge wheel arm(s). In this respect, as the seed-planting implement travels across the field, the disk opener(s) forms a furrow in the soil, while the gauge wheel(s) rolls along the surface and the field. The positioning of the gauge wheel(s) relative to the frame sets the depth of the furrow.

The furrow depth adjustment system includes various components that facilitate pivoting of the gauge wheel arm(s) relative to the frame, thereby allowing for adjustment of the furrow depth. Specifically, in several embodiments, the furrow depth adjustment system includes a wobble bracket configured to engage the gauge wheel arm(s) and a linkage arm coupled to the wobble bracket. For example, in one embodiment, the linkage arm includes a first side wall member, a second side wall member spaced apart from the first side wall member in a wide-wise direction, and a connection rod coupled between the first and second side wall members. Additionally, the furrow depth adjustment system includes an actuator (e.g., an electric motor), a gearbox coupled to the actuator, and a threaded shaft coupled to the gearbox.

Moreover, an actuation assembly is coupled between the threaded shaft and the linkage arm. In general, the actuation assembly is configured to transmit rotation of the threaded shaft into linear motion of the linkage arm. In this respect, the actuation assembly includes a hook arm and a collar. More specifically, a hook at a first end of the hook arm directly couples to the linkage arm. For example, the hook may directly couple to the connection rod of the linkage arm by wrapping around a portion of the outer surface of the connection rod. Conversely, an opposed, second end of the hook arm is pivotably coupled to the frame. Additionally, the collar is threadingly coupled to the threaded shaft. In some embodiments, an actuation arm is pivotably coupled to the hook arm and the collar.

In operation, the furrow depth adjustment system is configured to adjust the depth of the furrow being formed by the row unit. More specifically, to make an adjustment to the furrow depth, the actuator is operated to rotate the threaded shaft via the gearbox. Such rotation causes the collar to move along the length of the threaded shaft such that the actuation arm pivots the hook arm relative to the frame. The pivoting of the hook arm, in turn, causes linear movement of the linkage arm and the wobble bracket. Such movement of the wobble bracket pivots the gauge wheel arm(s) relative to the frame, thereby adjusting the position of the gauge wheel(s) relative to the frame.

The actuation assembly improves the operation of the row unit. More specifically, many row units include a handle assembly that allows an operator to manually adjust the position of the gauge wheel(s) relative to the frame. In this respect, the handle assembly may be coupled to the connection rod of the linkage arm. However, the hook of the hook arm of the actuation assembly can be coupled directly to the connection rod in place of the handle assembly, thereby allowing the actuator/gearbox/threaded shaft assembly to move the linkage assembly to automatically adjust the furrow depth. Thus, the actuation assembly allows for the installation of an actuator (e.g., an electric motor) on a row unit designed for manual actuation via a handle assembly without the need to redesign the linkage arm, the wobble bracket, the gauge wheel arm(s), or the frame. Additionally, the actuation assembly allows for a row unit having a handle assembly for manual furrow depth adjustment to be retrofitted with an actuator/gearbox/threaded shaft assembly.

Referring now to the drawings, FIG. 1 illustrates a perspective view of one embodiment of a seed-planting implement 10 in accordance with aspects of the present subject matter. In the illustrated embodiment, the seed-planting implement 10 is configured as a planter. However, in alternative embodiments, the seed-planting implement 10 may generally correspond to any suitable seed-planting equipment or implement, such as seeder or another seed-dispensing implement.

As shown in FIG. 1 , the seed-planting implement 10 includes a tow bar 12. In general, the tow bar 12 is configured to couple to a tractor or other agricultural vehicle (not shown), such as via a suitable hitch assembly (not shown). In this respect, the tractor may tow the seed-planting implement 10 across a field in a direction of travel (indicated by arrow 14) to perform a seed-planting operation on the field.

Furthermore, the seed-planting implement 10 includes a toolbar 16 coupled to an aft end of the tow bar 12. More specifically, the toolbar 16 is configured to support and/or couple to one or more components of the seed-planting implement 10. For example, the toolbar 16 is configured to support a plurality of seed-planting units or row units 100. As will be described below, each row unit 100 is configured to form a furrow having a desired depth within the soil of a field. Thereafter, each row unit 100 deposit seeds within the corresponding furrow and subsequently closes the corresponding furrow after the seeds have been deposited, thereby establishing rows of planted seeds.

In general, the seed-planting implement 10 may include any number of row units 100. For example, in the illustrated embodiment, the seed-planting implement 10 includes sixteen row units 100 coupled to the toolbar 16. However, in other embodiments, the seed-planting implement 10 may include six, eight, twelve, twenty-four, thirty-two, or thirty-six row units 100.

Additionally, in some embodiments, the seed-planting implement 10 includes a pneumatic distribution system 18. In general, the pneumatic distribution system 18 is configured to distribute seeds from a bulk storage tank (not shown) to the individual row units 100. As such, the pneumatic distribution system 18 may include a fan or other pressurized air source 20 and a plurality of seed conduits 22 extending between the fan 20 and the row units 100. In this respect, the pressurized air generated by the fan 20 conveys the seeds from the bulk storage tank through the seed conduits 22 to the individual row units 100. However, the seeds may be provided to the row units 100 in any other suitable manner.

It should be further appreciated that the configuration of the seed-planting implement 10 described above and shown in FIG. 1 is provided only to place the present subject matter in an exemplary field of use. Thus, it should be appreciated that the present subject matter may be readily adaptable to any manner of seed-planting implement configuration.

Referring now to FIG. 2 , a perspective view of one embodiment of a row unit 100 for a seed-planting implement is illustrated in accordance with aspects of the present subject matter. In general, the row unit 100 will be described herein with reference to the seed-planting implement 10 described above with reference to FIG. 1 . However, it should be appreciated by those of ordinary skill in the art that the disclosed row unit 100 may generally be utilized with seed-planting implements having any other suitable implement configuration.

As shown, the row unit 100 may include a frame 102 adjustably coupled to the toolbar 16 by upper and lower links 104, 106. For example, one end of each link 104, 106 may be pivotably coupled to the frame 102 of the row unit 100. Conversely, an opposed end of each link 104, 106 may be pivotably coupled to the toolbar 16. As such, the links 104, 106 may allow for adjustment of the vertical position of the row unit 100 relative to the toolbar 16. However, in alternative embodiments, the row unit 100 may be coupled to the toolbar 16 in any other suitable manner.

Moreover, the row unit 100 includes one or more disk openers 108 rotatably coupled to the frame 102. In general, the disk opener(s) 108 is configured to form a furrow within a field across which the seed-planting implement 10 is traveling. For example, the disk opener(s) 108 penetrates into the soil of the field to a desired furrow depth and rotates relative to the soil as the seed-planting implement 10 moves across the field in the direction of travel 14, thereby forming a furrow.

In addition, the row unit 100 includes one or more gauge wheels 110 adjustably coupled to the frame 102 via a gauge wheel arm(s) 112. In general, the gauge wheel(s) 110 is configured to set the penetration depth of the disk opener(s) 108. More specifically, as the seed-planting implement 10 moves across the field in the direction of travel 14, the gauge wheel(s) 110 rolls along the surface of the field. In this respect, the positioning of the gauge wheel(s) 110 relative to the frame 102 sets the depth to which the disk opener(s) 108 penetrate the soil and, thus, the depth of the furrow being formed by the row unit 100.

In several embodiments, the gauge wheel(s) 110 may be rotatably coupled to the gauge wheel arm(s) 112, with the gauge wheel arm(s) 112 being pivotably coupled to the frame 102. For example, in one embodiment, each gauge wheel arm 112 includes a lower arm portion 114 pivotably coupled to the frame 102 at one end thereof via a corresponding pivot joint 118. Furthermore, each gauge wheel 110 is rotatably coupled to the lower arm portion 114 of one of the gauge wheel arms 112 at an opposed end thereof via a corresponding pivot joint 120. In addition, each gauge wheel arm 112 includes an upper arm portion 116 extending generally upward from the lower arm portion 114. As will be described below, the upper arm portion(s) 116 may engage a furrow depth adjustment system 200 such that the relative positioning of the gauge wheel(s) 110 and the frame 102 can be adjusted.

Furthermore, the row unit 100 includes a seed-dispensing system 122 supported on the frame 102. In general, the seed-dispensing system 122 is configured to deposit seeds into the furrow formed by the disk opener(s) 108 such that the seeds are spaced apart from each other within the furrow by a predetermined distance. For example, in one embodiment, the seed-dispensing system 122 includes a hopper 124 coupled to the frame 102 configured to store seeds. In some embodiments, the hopper 124 may receive seeds from the bulk storage tank via the pneumatic distribution system 18. In addition, the seed-dispensing system 122 may include a seed meter 126 configured to meter or otherwise dispense seeds from the hopper 124 into a seed tube (not shown) at a predetermined rate. The seeds then fall through the seed tube and into the furrow such that the seeds are spaced apart by the predetermined distance.

Additionally, in several embodiments, the row unit 100 may include a closing assembly 128 supported on the frame 102 aft of the disk opener(s) 108 and the seed tube relative to the direction of travel 14. Specifically, in one embodiment, the furrow closing assembly 128 may include a pair of closing disks 130 (only one of which is shown) positioned relative to each other such that soil flows between the disks 130 as the seed-planting implement 10 travels across the field. In this respect, the closing disks 130 are configured to close the furrow after seeds have been deposited therein, such as by collapsing the excavated soil into the furrow.

Moreover, in some embodiments, the row unit 100 may include a press wheel assembly 132 supported on the frame 102 aft of the closing assembly 128 relative to the direction of travel 14. Specifically, in several embodiments, the press wheel assembly 56 may include a press wheel 134 configured to roll over the closed furrow to firm the soil over the seed and promote favorable seed-to-soil contact.

FIG. 3 illustrates a partial, front view of the row unit 100. As mentioned above, the row unit 100 includes one or more gauge wheels 110 adjustably coupled to the frame 102 of the row unit 100 via a gauge wheel arm(s) 112. For example, in the illustrated embodiment, the row unit 100 includes a first gauge wheel 110A adjustably coupled to the frame 102 via a first gauge wheel arm 112A and a second gauge wheel 110B adjustably coupled to the frame 102 via a second gauge wheel arm 112B. However, in alternative embodiments, the row unit 100 may include any other suitable number of gauge wheels 110 and gauge wheel arms 112, such as a single gauge 110 adjustably coupled to the frame 102 via a single gauge wheel arm 112.

Additionally, as mentioned above, the row unit 100 includes a furrow depth adjustment system 200. In general, the furrow depth adjustment system 200 is configured to adjust the position of the gauge wheel(s) 110 relative to the frame 102, thereby adjusting the depth of the furrow being formed by the row unit 100. Specifically, as will be described below, the furrow depth adjustment system 200 is configured to pivot the gauge wheel arm(s) 112 relative to the frame 102 to make such adjustments.

In several embodiments, the furrow depth adjustment system 200 includes a wobble bracket 202. In general, the wobble bracket 202 is configured to engage gauge wheel arm(s) 112. For example, the wobble bracket 202 may be in direct contact with the upper arm portion(s) 116 of the gauge wheel arm(s) 112. As such, linear movement of the wobble bracket 202 causes the gauge wheel arm(s) 112 to pivot relative to the frame 102 about the pivot joint(s) 118.

The wobble bracket 202 may have any suitable configuration that allows the wobble bracket 202 to engage with the gauge wheel arm(s) 112 in manner that allows for pivoting of the gauge wheel arm(s) 112. For example, in the illustrated embodiment, the wobble bracket 202 includes a base portion 204 and first and second arms 206, 208 extending outward from the base portion 204 in a direction generally perpendicular to the direction of travel 14. In this respect, the first arm 206 of the wobble bracket 202 is in contact with the upper arm portion 116 of the first gauge wheel arm 112A. Similarly, the second arm 208 of the wobble bracket 202 is in contact with the upper arm portion 116 of the second gauge wheel arm 112B. As such, linear movement of the wobble bracket 202 simultaneously pivots the first and second gauge wheel arms 112A, 112B relative to the frame 102 about the corresponding pivot joints 118.

Moreover, the furrow depth adjustment system 200 includes a linkage arm 210 coupled to the wobble bracket 202. In this respect, the linkage arm 210 is configured to linearly move the wobble bracket 202 relative to the frame 102 to pivot the gauge wheel arm(s) 112. For example, in one embodiment, the linkage arm 210 includes a clevis portion 212 configured to receive the base portion 204 of the wobble bracket 202. Furthermore, in such an embodiment, the clevis portion 212 is pivotably coupled to the base portion 204 of the wobble bracket 202 via a pin 214. The pin 214, in turn, allows the wobble bracket 202 to pivot within the clevis portion 212. However, in alternative embodiments, the linkage arm 210 may be coupled to the wobble bracket 202 in any other suitable manner.

FIG. 4 illustrates a partial cross-sectional view of the row unit 100. As shown, the wobble bracket 202 is generally positioned at the forward end of the row unit relative to the direction of travel 14. In this respect, the linkage arm 210 generally extends along the length of the row unit 100 (i.e., parallel to the direction of travel 14). As such, the clevis portion 212 of linkage arm 210 is similarly positioned at the forward end of the row unit 100 relative to the direction of travel 14.

The linkage arm 210 may have any suitable construction that allows linear motion to be transmitted along the length of the row unit 100 to the wobble bracket 202. For example, in the illustrated embodiment, the linkage arm 210 includes a center portion 216 coupled to and positioned aft of the clevis portion 212. The center portion 216 of the linkage arm 210 may be formed from a pair of parallel, spaced apart side wall members 218 (one of which is shown). Additionally, in the illustrated embodiment, the linkage arm 210 includes a coupling block 220 coupled to (e.g., threadingly) and positioned aft of the center portion 216. Moreover, in the illustrated embodiment, the linkage arm 210 includes a rear portion 222 coupled to (e.g., threadingly) and positioned aft of the coupling block 220.

In addition, the furrow depth adjustment system 200 includes an actuator assembly 224 supported on the frame 102 of the row unit 100. In general, the actuator assembly 224 is configured to linearly move the linkage arm 210 and the wobble bracket 202 to pivot the gauge wheel arm(s) 112 relative to the frame 102. In several embodiments, the actuator assembly 224 includes a housing (not shown) coupled to the frame 102. The housing may, in turn, be configured to enclose and/or otherwise support one or more components of the actuator assembly 224. Specifically, as shown, the actuator assembly 224 includes an actuator 226 positioned within the housing. As will be described below, the actuator 226 (e.g., an electric motor) is configured to generate the motion necessary to move the linkage arm 210. Moreover, the actuator assembly 224 includes a gearbox or transmission 228 coupled to the actuator 226. Additionally, the actuator assembly 224 includes a threaded shaft 230 coupled to the gearbox 228. In this respect, the gearbox 228 converts rotation generated by the actuator 226 into rotation of the threaded shaft 230 (e.g., at a different speed and/or with a different torque amount). Such rotation of the threaded shaft, in turn, causes the linkage arm 210 to linearly move (e.g., as indicated by arrow 245) in a manner that pivots the gauge wheel arm(s) 112.

In general, the actuator assembly 224 is positioned adjacent to the aft end of the row unit 100 relative to the direction of travel 14. For example, as shown, the actuator assembly 224 may be positioned adjacent to a depth-setting register 244 defined by the frame 102 of the row unit 100. As will be described below, the depth-setting register 244 may be formed within the frame 102 to allow for manual furrow depth adjustments.

Furthermore, the furrow depth adjustment system 200 includes an actuation assembly 234. In several embodiments, the actuation assembly 234 includes a support member 236 coupled to the frame 102 and a hook arm 238 pivotably coupled to the frame 102 and to the linkage arm 210. Additionally, in such embodiments, the actuation assembly 234 includes a collar 240 threadingly coupled to the threaded shaft 230 and an actuation arm 242 pivotably coupled to the hook arm 238 and to the collar 240. As will be described below, the actuation assembly 234 is configured to convert rotation of the threaded shaft 230 into linear motion (e.g., as indicated by arrow 245) of the linkage arm 210.

FIG. 5 illustrates an enlarged view of the embodiment of the actuation assembly 234 shown in FIG. 4 . More specifically, as shown, the support member 236 is configured to couple to and/or support one or more components of the actuation assembly 234 relative to the frame 102. In this respect, the support member 236 may be coupled to the frame 102, such as at a connection point 262. Additionally, the support member 236 may support and/or be coupled to the actuator assembly 224.

Furthermore, as indicated above, the hook arm 238 of the actuation assembly 234 may be coupled between the frame 102 and the rear portion 222 of the linkage arm 210. More specifically, in several embodiments, the hook arm 238 includes a first end 246 and a second end 248 opposed to the first end 246. As such, the first end 246 of the hook arm 238 is coupled to the rear portion 222 of the linkage arm 210. Additionally, the second end 248 of the hook arm 238 is coupled to the support member 236 at pivot joint 260. Thus, the first end 246 of the hook arm 238 is configured to pivot relative to the frame 102.

Referring to FIG. 6 , and as mentioned above, the first end 246 of the hook arm 238 is coupled to the rear portion 222 of the linkage arm 210. Specifically, in such embodiments, the rear portion 222 of the linkage arm 210 includes first and second side wall members 249, 250 spaced apart from each other in a width-wise direction (indicated by arrow 252 in FIG. 6 ) of the linkage arm 210. The width-wise direction 252, in turn, generally extends perpendicular to the direction of travel 14. Moreover, the rear portion 222 of the linkage arm 210 includes a connection rod 254 extending with the width-wise direction 252 between the first and second side wall members 249, 250 to couple the first and second side wall members 249, 250 together. As will be described below, the first end 246 of the hook arm 238 may directly couple to the connection rod 254.

As shown, the first end 246 of the hook arm 238 forms a hook 256 that directly couples to the linkage arm 210. Specifically, in several embodiments, the hook 256 of the hook arm 238 is directly coupled to the connection rod 254. For example, in some embodiments, the hook 256 wraps around a portion of an outer surface 258 of the connection rod 254 such that the hook 256 is in direct contact with the outer surface 258 of the connection rod 254. In this respect, the hook 256 (and the first end 246 of the hook arm 238 in general) may be positioned between the first and second side wall members 249, 250 of the linkage arm 210 in the width-wise direction 252.

Referring again to FIG. 5 , as mentioned above, the actuation arm 242 is coupled between the hook arm 238 and the collar 240. More specifically, as shown, in some embodiments, one end of the actuation arm 242 is coupled to the hook arm 238 at a pivot joint 264. The pivot joint 264 is, in turn, positioned between the first and second ends 246, 248 of the hook arm 238. Moreover, the opposed end of the actuation arm 242 is coupled to the collar 240 at a pivot joint 266. Thus, as will be described below, the actuation arm 242 converts movement of the collar 240 along the threaded shaft 230 into pivoting of the hook arm 238 relative to the frame 102.

As shown in FIG. 7 , the collar 240 is threadingly coupled to the threaded shaft 230. More specifically, the threaded shaft 230 includes a shaft body 268 having threads 270 extending helically around the shaft body 268. For example, in some embodiment, the threads 270 are configured as acme threads. However, in other embodiments, any other suitable type of threads may be used. Moreover, the collar 240 may define a threaded passage 272 extending therethrough. As such, the threaded shaft 230 may threadingly engage the threaded passage 272 of the collar 240. In this respect, rotation of the threaded shaft 230 (indicated by arrow 274 in FIG. 7 ) may cause pivotable motion of the actuation arm 242 and the hook arm 238, which, in turn, may result in linear motion of the linkage arm 210 (indicated by the arrow 245 in FIG. 4 ).

Additionally, as shown in FIG. 8 , in some embodiments, the threaded shaft 230 and the support arm 236 may extend through the depth-setting register 244 of the row unit 100. More specifically, as mentioned above, the rear portion of the frame 102 of the row unit 100 may define the depth-setting register 244 used to manually adjust the depth of the furrow being formed by the row unit 100. For example, in some furrow depth adjustment systems, a handle assembly (not shown) may be coupled to the linkage arm 210. As such, the depth-setting register 244 may include a plurality of depth detents 276 into which the handle assembly can be manually positioned by an operator. However, with the furrow depth adjustment system 200 disclosed herein, the handle assembly is removed and replaced with the actuator assembly 224 to allow for automatic adjustment of the furrow depth. In this respect, the threaded shaft 230 of the actuation assembly 224 and a portion of the support arm 236 may extend through the depth-setting register 244 of the frame 102 to couple the actuator 226 and gearbox 228 of the actuator assembly 224 to the collar 240 of the actuation assembly 234. As will be described below, such a configuration eliminates the need to redesign the frame 102 when installing the actuator assembly 224.

As indicated above, the furrow depth adjustment system 200 is configured to automatically adjust the depth of the furrow being formed by the row unit 100 by adjusting the position of the gauge wheel(s) 110 relative to the frame 102. More specifically, and as best illustrated in FIG. 4 , to adjust the furrow depth, the actuator 226 rotates the threaded shaft 230 via the gearbox 228. The rotation of the threaded shaft 230 causes the collar 240 to move along the length of the threaded shaft 230. The actuation arm 242 converts movement of the collar 240 along the threaded shaft 230 into pivoting of the hook arm 238 relative to the frame 102. Such pivoting of the hook arm 238 results in linear movement of the linkage arm 210 and the wobble bracket 202. The linear movement of the wobble bracket 202, in turn, pivots the gauge wheel arm(s) 112 about the pivot joint(s) 118 relative to the frame 102 of the row unit 100. Such pivoting of the gauge wheel arm(s) 112 relative to the frame 102 adjusts the position of the gauge wheel(s) 110 relative to the frame 102, thereby adjusting the depth of the furrow being formed by the disk opener(s) 108 of the row unit 100.

FIG. 9 illustrates another embodiment of the furrow depth adjustment system 200. More specifically, the furrow depth adjustment system 200 of FIG. 9 is configured similarly to the furrow depth adjustment system 200 shown in FIGS. 4-8 . For example, like the furrow depth adjustment system 200 of FIGS. 4-8 , the furrow depth adjustment system 200 of FIG. 9 includes the wobble bracket 202, the linkage arm 210, the actuator 226, the gearbox 228, the threaded shaft 230, and the actuation assembly 234 coupled between the linkage arm 210 and the threaded shaft 230. Moreover, like the furrow depth adjustment system 200 of FIGS. 4-8 , the actuation assembly 234 shown in FIG. 9 includes the support member 236 and the hook arm 238 having the hook 256 coupled to the rear portion 222 of the linkage arm 210 and pivotably coupled to the frame 102 via the support member 236.

However, unlike the furrow depth adjustment system 200 of FIGS. 4-8 , the actuation assembly 234 shown in FIG. 9 includes first and second collars 278, 280 and first and second actuation arms 282, 284. More specifically, in such an embodiment, the first and second collars 278, 280 threadingly engage and are spaced apart from each other along the threaded shaft 230. Furthermore, one end of the first actuation arm 282 is coupled to the hook arm 238 at a pivot joint 286. The pivot joint 286 is, in turn, positioned between the first and second ends 246, 248 of the hook arm 238. Additionally, the opposed end of the first actuation arm 282 is coupled to the first collar 278 at a pivot joint 288. Moreover, one end of the second actuation arm 284 is coupled to the hook arm 238 at a pivot joint 290. The pivot joint 290 is, in turn, positioned between the first and second ends 246, 248 of the hook arm 238 and, more specifically, between the pivot joint 286 and the first end 246. In addition, the opposed end of the second actuation arm 284 is coupled to the second collar 280 at a pivot joint 292. Thus, the first and second actuation arms 282, 284 convert movement of the first and second collars 278, 280 along the threaded shaft 230 into pivoting of the hook arm 238 relative to the frame 102.

FIG. 10 illustrates a further embodiment of the furrow depth adjustment system 200. More specifically, the furrow depth adjustment system 200 of FIG. 10 is configured similarly to the furrow depth adjustment system 200 shown in FIGS. 4-8 . For example, like the furrow depth adjustment system 200 of FIGS. 4-8 , the furrow depth adjustment system 200 of FIG. 10 includes the wobble bracket 202, the linkage arm 210, the actuator 226, the gearbox 228, the threaded shaft 230, and the actuation assembly 234 coupled between the linkage arm 210 and the threaded shaft 230. Moreover, like the furrow depth adjustment system 200 of FIGS. 4-8 , the actuation assembly 234 shown in FIG. 10 includes the hook arm 238 having the hook 256 coupled to the rear portion 222 of the linkage arm 210 and the collar 240 threading coupled to the threaded shaft 230.

However, unlike the furrow depth adjustment system 200 of FIGS. 4-8 , actuation assembly 234 shown in FIG. 10 includes several actuation arms. More specifically, in the illustrated embodiment, the actuation assembly 234 includes a support member 294 coupled to the frame 102. In one embodiment, the support member 294 may support and/or be coupled to the actuator assembly 224. The one end of the threaded shaft 230 may be received by and rotate relative to the support member 294. Furthermore, in the illustrated embodiment, the actuation assembly 234 includes first and second actuation arms 296, 298 pivotably coupled to the hook arm 238 at pivot joints 300, 302 located at the second end 248 of the hook arm 238, respectively. Additionally, in the illustrated embodiment, the actuation assembly 234 includes a third actuation arm 304 pivotably coupled to the first actuation arm 296 at a pivot joint 306 and to the support member 294 at a pivot joint 308. Moreover, in the illustrated embodiment, the actuation assembly 234 includes a fourth actuation arm 304 pivotably coupled the second actuation arm 298 at a pivot joint 312 and to the collar 240 at a pivot joint 314. Thus, the first, second, third, and fourth actuation arms 296, 298, 304, 310 convert movement of the collar 240 along the threaded shaft 230 relative to the support member 294 and frame 102 into pivoting of the hook arm 238 relative to the frame 102.

The actuation assembly 234 improves the operation of the row unit 100. More specifically, many row units include a handle assembly that allows an operator to manually adjust the position of the gauge wheel(s) 110 relative to the frame 102 (e.g., using the depth-setting register 244). In this respect, the handle assembly may be coupled to the connection rod 254 of the linkage arm 210. However, the hook 256 of the hook arm 238 of the actuation assembly 234 can be coupled directly to the connection rod 254 in place of the handle assembly, thereby allowing the actuator assembly 224 to move the linkage arm 210 to automatically adjust the furrow depth. Thus, the actuation assembly 234 allows for the installation of the actuator assembly 224 on the row unit 100, which was initially designed for manual actuation via a handle assembly, without the need to redesign the linkage arm 210, the wobble bracket 202, the gauge wheel arm(s) 112, or the frame 102. Additionally, the actuation assembly 234 allows for a row unit having a handle assembly for manual furrow depth adjustment to be retrofitted with the actuator assembly 224.

This written description uses examples to disclose the technology, including the best mode, and also to enable any person skilled in the art to practice the technology, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the technology is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims. 

1. A row unit for a seed-planting implement, the row unit comprising: a frame; a disk opener rotatably coupled to the frame, the disk opener configured to form a furrow within a field across which the seed-planting implement is traveling; a gauge wheel arm pivotably coupled to the frame; a gauge wheel rotatably coupled to the gauge wheel arm, the gauge wheel configured to roll along a surface of the field; a wobble bracket configured to engage the gauge wheel arm; a linkage arm coupled to the wobble bracket; an actuator configured to move the linkage arm relative to the frame in a manner that adjusts a position of the gauge wheel relative to the frame; a gearbox coupled to the actuator; a threaded shaft coupled to the gearbox; and an actuation assembly coupled between the linkage arm and the threaded shaft such that the actuation assembly transmits rotation of the threaded shaft into linear motion of the linkage arm, the actuation assembly comprising: a hook arm having a first end and a second end opposed to the first end, the first end forming a hook that directly couples to the linkage arm, the second end pivotably coupled to the frame; and a collar threadingly coupled to the threaded shaft.
 2. The row unit of claim 1, wherein movement of the collar along the threaded shaft causes pivoting of the hook arm relative to the frame.
 3. The row unit of claim 2, wherein the actuation assembly further comprises: an actuation arm pivotably coupled to the hook arm and the collar such that the actuation arm transmits the movement of the collar along the threaded shaft into the pivoting of the hook arm relative to the frame.
 4. The row unit of claim 2, wherein the collar corresponds to a first collar and the actuation assembly further comprises: a first actuation arm pivotably coupled to the hook arm and the first collar; a second collar threadingly coupled to the threaded shaft; and a second actuation arm pivotably coupled to the hook arm and the second collar such that the first and second actuation arms transmit the movement of the first and second collars along the threaded shaft into the pivoting of the hook arm relative to the frame.
 5. The row unit of claim 2, wherein the actuation assembly further comprises: a support member coupled to the frame; a first actuation arm pivotably coupled to the hook arm; a second actuation arm pivotably coupled to the hook arm; a third actuation arm pivotably coupled to first actuation arm and the support member; and a fourth actuation arm pivotably coupled to second actuation arm and the collar such that the first, second, third, and fourth actuation arms transmit the movement of the collar along the threaded shaft into the pivoting of the hook arm relative to the frame.
 6. The row unit of claim 5, wherein the third actuation arm is pivotably coupled to the fourth actuation arm.
 7. The row unit of claim 1, wherein the linkage arm comprises: a first side wall member; a second side wall member spaced apart from the first side wall member in a width-wise direction of the linkage arm; and a connection rod extending with the width-wise direction between the first and second side wall members.
 8. The row unit of claim 7, wherein the hook is directly coupled to the connection rod.
 9. The row unit of claim 8, wherein the hook wraps around a portion of an outer surface of the connection rod.
 10. The row unit of claim 9, wherein the hook is positioned between the first and second side wall members in the width-wise direction.
 11. The row unit of claim 1, wherein the collar defines a threaded passage configured to threadingly receive the threaded shaft.
 12. The row unit of claim 1, wherein the frame defines a depth-setting register including a plurality of depth detents, the threaded shaft extending through the depth-setting register.
 13. The row unit of claim 1, wherein the gauge wheel arm corresponds to a first gauge wheel arm and the gauge wheel corresponds to a first gauge wheel, the row unit further comprising: a second gauge wheel arm pivotably coupled to the frame; and a second gauge wheel rotatably coupled to the second gauge wheel arm, the second gauge wheel configured to roll along the surface of the field, wherein the wobble bracket is configured to engage the second gauge wheel arm.
 14. The row unit of claim 1, further comprising: a closing assembly positioned aft of the disk opener relative to a direction of travel of the seed-planting implement, the closing assembly configured to close the furrow formed within the field.
 15. The row unit of claim 11, further comprising: a press wheel assembly positioned aft of the closing assembly relative to the direction of travel, the press wheel assembly configured to roll over the closed furrow.
 16. A seed-planting implement, comprising: a toolbar; and a plurality of row units coupled to the toolbar, each row unit comprising: a frame; a disk opener rotatably coupled to the frame, the disk opener configured to form a furrow within a field across which the seed-planting implement is traveling; a gauge wheel arm pivotably coupled to the frame; a gauge wheel rotatably coupled to the gauge wheel arm, the gauge wheel configured to roll along a surface of the field; a wobble bracket configured to engage the gauge wheel arm; a linkage arm coupled to the wobble bracket; an actuator configured to move the linkage arm relative to the frame in a manner that adjusts a position of the gauge wheel relative to the frame; a gearbox coupled to the actuator; a threaded shaft coupled to the gearbox; and an actuation assembly coupled between the linkage arm and the threaded shaft such that the actuation assembly transmits rotation of the threaded shaft into linear motion of the linkage arm, the actuation assembly comprising: a hook arm having a first end and a second end opposed to the first end, the first end forming a hook that directly couples to the linkage arm, the second end pivotably coupled to the frame; and a collar threadingly coupled to the threaded shaft.
 17. The seed-planting implement of claim 16, wherein movement of the collar along the threaded shaft causes pivoting of the hook arm relative to the frame.
 18. The seed-planting implement of claim 17, wherein the actuation assembly further comprises: an actuation arm pivotably coupled to the hook arm and the collar such that the actuation arm transmits the movement of the collar along the threaded shaft into the pivoting of the hook arm relative to the frame.
 19. The seed-planting implement of claim 17, wherein the collar corresponds to a first collar and the actuation assembly further comprises: a first actuation arm pivotably coupled to the hook arm and the first collar; a second collar threadingly coupled to the threaded shaft; and a second actuation arm pivotably coupled to the hook arm and the second collar such that the first and second actuation arms transmit the movement of the first and second collars along the threaded shaft into the pivoting of the hook arm relative to the frame.
 20. The seed-planting implement of claim 17, wherein the collar corresponds to a first collar and the actuation assembly further comprises: a support member coupled to the frame; a first actuation arm pivotably coupled to the hook arm; a second actuation arm pivotably coupled to the hook arm; a third actuation arm pivotably coupled to first actuation arm and the support member; and a fourth actuation arm pivotably coupled to second actuation arm and the collar such that the first, second, third, and fourth actuation arms transmit the movement of the collar along the threaded shaft into the pivoting of the hook arm relative to the frame. 